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AArch64: support funclets in fastcall and swift_call 

Functions annotated with `__fastcall` or `__attribute__((__fastcall__))`
or `__attribute__((__swiftcall__))` may contain SEH handlers even on
Win64.  This matches the behaviour of cl which allows for
`__try`/`__except` inside a `__fastcall` function.  This was detected
while trying to self-host clang on Windows ARM64.

llvm-svn: 348337
This commit is contained in:
Saleem Abdulrasool 2018-12-05 07:09:20 +00:00
parent d49fc9c6fa
commit efd2cb8a0d
2 changed files with 38 additions and 0 deletions
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2
llvm/lib/Target/AArch64/AArch64Subtarget.h
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@ -385,6 +385,8 @@ public:
bool isCallingConvWin64(CallingConv::ID CC) const {
switch (CC) {
case CallingConv::C:
case CallingConv::Fast:
case CallingConv::Swift:
return isTargetWindows();
case CallingConv::Win64:
return true;

36
llvm/test/CodeGen/AArch64/windows-SEH-support.ll Normal file
View File

@ -0,0 +1,36 @@
; RUN: llc -mtriple aarch64-unknown-windows-msvc -filetype asm -o /dev/null %s
declare dllimport void @f() local_unnamed_addr
declare dso_local i32 @__C_specific_handler(...)
define hidden swiftcc void @g() unnamed_addr personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) {
entry:
invoke void @f() to label %__try.cont unwind label %catch.dispatch
catch.dispatch: ; preds = %entry
%0 = catchswitch within none [label %__except] unwind to caller
__except:
%1 = catchpad within %0 [i8* null] ; preds = %catch.dispatch
catchret from %1 to label %__try.cont
__try.cont: ; preds = %__except, %entry
ret void
}
define hidden fastcc void @h() unnamed_addr personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) {
entry:
invoke void @f() to label %__try.cont unwind label %catch.dispatch
catch.dispatch: ; preds = %entry
%0 = catchswitch within none [label %__except] unwind to caller
__except: ; preds = %catch.dispatch
%1 = catchpad within %0 [i8* null]
catchret from %1 to label %__try.cont
__try.cont: ; preds = %__except, %entry
ret void
}